Gerdau SA (ADR) (NYSE:GGB), Tops WhisperfromWallStreet's Midday Basic Materials Watch. By: SBWire - Latest Press Releases January 22, 2014 at 11:20 AM EST Rochester, NY -- (SBWIRE) -- 01/22/2014 -- WhisperfromWallStreet Issues today’s mid Basic Materials advancers. Read More >> Related Stocks: Gerdau S.A. ADR